feat: add IsPositive tag validator

types.go

@@ -132,6 +132,7 @@ var TagMap = map[string]Validator{
 	"float":              IsFloat,
 	"null":               IsNull,
 	"notnull":            IsNotNull,
+	"positive":           Positive,
 	"uuid":               IsUUID,
 	"uuidv3":             IsUUIDv3,
 	"uuidv4":             IsUUIDv4,

validator.go

@@ -222,6 +222,12 @@ func IsUTFNumeric(str string) bool {
 
 }
 
+// Positive checks if the a positive numeric value.
+func Positive(str string) bool {
+	value, _ := ToFloat(str)
+	return IsPositive(value)
+}
+
 // IsUTFDigit checks if the string contains only unicode radix-10 decimal digits. Empty string is valid.
 func IsUTFDigit(str string) bool {
 	if IsNull(str) {

validator_test.go

@@ -3543,6 +3543,28 @@ func TestValidateStructParamValidatorInt(t *testing.T) {
 	}
 }
 
+func TestValidateStructPositive(t *testing.T) {
+	t.Parallel()
+	type Test struct {
+		Value int `valid:"positive"`
+	}
+
+	var tests = []struct {
+		test Test
+		err  bool
+	}{
+		{Test{1}, false},
+		{Test{-1}, true},
+		{Test{0}, false},
+	}
+	for _, test := range tests {
+		if _, err := ValidateStruct(test.test); (err != nil) != test.err {
+			t.Errorf("Expected ValidateStruct error to be %v, got %v", test.err, err)
+
+		}
+	}
+}
+
 func TestValidateStructUpperAndLowerCaseWithNumTypeCheck(t *testing.T) {
 
 	type StructCapital struct {